package com.ruoyi.system.service.impl;

import cn.hutool.core.collection.CollectionUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.extension.conditions.query.LambdaQueryChainWrapper;
import com.ruoyi.common.annotation.DataScope;
import com.ruoyi.common.constant.StatusConstants;
import com.ruoyi.common.constant.UserConstants;
import com.ruoyi.common.core.domain.TreeSelect;
import com.ruoyi.common.core.domain.entity.SysDept;
import com.ruoyi.common.core.text.Convert;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.system.domain.SysRoleDept;
import com.ruoyi.system.mapper.SysDeptMapper;
import com.ruoyi.system.service.ISysDeptService;
import com.ruoyi.system.service.ISysRoleDeptService;
import com.ruoyi.system.service.ISysRoleService;
import com.ruoyi.system.service.ISysUserDeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.stream.Collectors;

/**
 * 部门管理 服务实现
 *
 * @author ruoyi
 */

@Service
public class SysDeptServiceImpl implements ISysDeptService {
    @Autowired
    private SysDeptMapper deptMapper;

    @Autowired
    private ISysRoleService roleService;

    @Autowired
    private ISysRoleDeptService roleDeptService;

    @Autowired
    private ISysUserDeptService userDeptService;

    /**
     * 查询部门管理数据
     *
     * @param dept 部门信息
     * @return 部门信息集合
     */
    @Override
    @DataScope(deptAlias = "d")
    public List<SysDept> selectDeptList(SysDept dept) {
        return new LambdaQueryChainWrapper<>(deptMapper)
                .eq(SysDept::getDelFlag, StatusConstants.DEL_FLAG_NORMAL)
                .eq(dept.getDeptId() != null && dept.getDeptId() != 0, SysDept::getDeptId, dept.getDeptId())
                .eq(dept.getParentId() != null && dept.getParentId() != 0, SysDept::getParentId, dept.getParentId())
                .like(StringUtils.isNotBlank(dept.getDeptName()), SysDept::getDeptName, dept.getDeptName())
                .eq(StringUtils.isNotBlank(dept.getStatus()), SysDept::getStatus, dept.getStatus())
                .list();
    }

    public List<SysDept> selectSonAndGrandList(Long deptId) {
        List<SysDept> list = new ArrayList<>();
        SysDept dept = new LambdaQueryChainWrapper<>(deptMapper)
                .eq(SysDept::getDeptId, deptId)
                .one();
        if (dept == null) {
            return list;
        }
        list.add(dept);
        List<SysDept> son = new LambdaQueryChainWrapper<>(deptMapper)
                .in(SysDept::getParentId, deptId)
                .list();
        if (CollectionUtil.isEmpty(son)) {
            return list;
        }
        list.addAll(son);
        List<Long> sonIds = son.stream().map(SysDept::getDeptId).toList();
        List<SysDept> grandSon = new LambdaQueryChainWrapper<>(deptMapper)
                .in(SysDept::getParentId, sonIds)
                .list();
        list.addAll(grandSon);
        return list;
    }

    /**
     * 查询部门树结构信息
     *
     * @param dept 部门信息
     * @return 部门树信息集合
     */
    @Override
    public List<TreeSelect> selectDeptTreeList(SysDept dept) {
        LambdaQueryWrapper<SysDept> queryWrapper = new LambdaQueryWrapper<SysDept>()
                .eq(dept.getDeptId() != null, SysDept::getDeptId, dept.getDeptId())
                .like(StringUtils.isNotBlank(dept.getDeptName()), SysDept::getDeptName, dept.getDeptName())
                .eq(StringUtils.isNotBlank(dept.getStatus()), SysDept::getStatus, dept.getStatus())
                .eq(StringUtils.isNotBlank(dept.getDelFlag()), SysDept::getDelFlag, dept.getDelFlag())
                .eq(dept.getParentId() != null, SysDept::getParentId, dept.getParentId())
                .orderByAsc(SysDept::getParentId)
                .orderByAsc(SysDept::getOrderNum);
        deptMapper.selectList(queryWrapper);
        List<SysDept> depts = selectDeptList(dept);
        return buildDeptTreeSelect(depts);
    }

    /**
     * 构建前端所需要树结构
     *
     * @param depts 部门列表
     * @return 树结构列表
     */
    @Override
    public List<SysDept> buildDeptTree(List<SysDept> depts) {
        List<SysDept> returnList = new ArrayList<SysDept>();
        List<Long> tempList = depts.stream().map(SysDept::getDeptId).collect(Collectors.toList());
        for (SysDept dept : depts) {
            // 如果是顶级节点, 遍历该父节点的所有子节点
            if (!tempList.contains(dept.getParentId())) {
                recursionFn(depts, dept);
                returnList.add(dept);
            }
        }
        if (returnList.isEmpty()) {
            returnList = depts;
        }
        return returnList;
    }

    /**
     * 构建前端所需要下拉树结构
     *
     * @param depts 部门列表
     * @return 下拉树结构列表
     */
    @Override
    public List<TreeSelect> buildDeptTreeSelect(List<SysDept> depts) {
        List<SysDept> deptTrees = buildDeptTree(depts);
        return deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
    }

    /**
     * 根据角色ID查询部门树信息
     *
     * @param roleId 角色ID
     * @return 选中部门列表
     */
    @Override
    public List<Long> selectDeptListByRoleId(Long roleId) {
        List<SysRoleDept> roleDepts = roleDeptService.selectByRoleId(roleId);
        List<Long> deptIds = roleDepts.stream().map(SysRoleDept::getDeptId).toList();
        List<SysDept> depts = deptMapper.selectByIds(deptIds);
        List<Long> parentIds = depts.stream().map(SysDept::getParentId).toList();
        List<SysDept> list = new LambdaQueryChainWrapper<>(deptMapper)
                .in(SysDept::getDeptId, deptIds)
                .notIn(SysDept::getParentId, parentIds)
                .list();
        return list.stream().map(SysDept::getDeptId).toList();
    }

    /**
     * 根据部门ID查询信息
     *
     * @param deptId 部门ID
     * @return 部门信息
     */
    @Override
    public SysDept selectDeptById(Long deptId) {
        return deptMapper.selectById(deptId);
    }

    /**
     * 根据ID查询所有子部门（正常状态）
     *
     * @param deptId 部门ID
     * @return 子部门数
     */
    @Override
    public int selectNormalChildrenDeptById(Long deptId) {
        Long count = new LambdaQueryChainWrapper<>(deptMapper)
                .eq(SysDept::getStatus, StatusConstants.DEL_FLAG_NORMAL)
                .eq(SysDept::getDelFlag, StatusConstants.DEL_FLAG_NORMAL)
                .apply("find_in_set(#{deptId}, ancestors)", deptId)
                .count();
        return count == null ? 0 : count.intValue();
    }

    /**
     * 是否存在子节点
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public boolean hasChildByDeptId(Long deptId) {
        return new LambdaQueryChainWrapper<>(deptMapper)
                .eq(SysDept::getParentId, deptId)
                .eq(SysDept::getDelFlag, StatusConstants.DEL_FLAG_NORMAL)
                .exists();
    }

    /**
     * 查询部门是否存在用户
     *
     * @param deptId 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(Long deptId) {
        return userDeptService.hasUserByDeptId(deptId);
    }

    /**
     * 校验部门名称是否唯一
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public boolean checkDeptNameUnique(SysDept dept) {
        long deptId = StringUtils.isNull(dept.getDeptId()) ? -1L : dept.getDeptId();
        SysDept info = new LambdaQueryChainWrapper<>(deptMapper)
                .eq(SysDept::getDeptName, dept.getDeptName())
                .eq(SysDept::getParentId, dept.getParentId())
                .eq(SysDept::getDelFlag, StatusConstants.DEL_FLAG_NORMAL)
                .one();
        if (StringUtils.isNotNull(info) && info.getDeptId() != deptId) {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }

    /**
     * 校验部门是否有数据权限
     *
     * @param deptId 部门id
     */
    @Override
    public void checkDeptDataScope(Long deptId) {
//        if (!SysUser.isAdmin(SecurityUtils.getUserId()) && StringUtils.isNotNull(deptId))
//        {
//            SysDept dept = new SysDept();
//            dept.setDeptId(deptId);
//            List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
//            if (StringUtils.isEmpty(depts))
//            {
//                throw new ServiceException("没有权限访问部门数据！");
//            }
//        }
    }

    /**
     * 新增保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int insertDept(SysDept dept) {
        SysDept info = deptMapper.selectById(dept.getParentId());
        // 如果父节点不为正常状态,则不允许新增子节点
        if (!UserConstants.DEPT_NORMAL.equals(info.getStatus())) {
            throw new ServiceException("部门停用，不允许新增");
        }
        dept.setAncestors(info.getAncestors() + "," + dept.getParentId());
        return deptMapper.insert(dept);
    }

    /**
     * 修改保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    @Transactional
    public int updateDept(SysDept dept) {
        SysDept newParentDept = deptMapper.selectById(dept.getParentId());
        SysDept oldDept = deptMapper.selectById(dept.getDeptId());
        if (newParentDept != null && oldDept != null) {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors(newAncestors);
            updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
        }
        int result = deptMapper.updateById(dept);
        if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
                && !StringUtils.equals("0", dept.getAncestors())) {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatusNormal(dept);
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     *
     * @param dept 当前部门
     */
    private void updateParentDeptStatusNormal(SysDept dept) {
        String ancestors = dept.getAncestors();
        Long[] deptIds = Convert.toLongArray(ancestors);
        UpdateWrapper<SysDept> updateWrapper = new UpdateWrapper<>();
        updateWrapper.in("dept_id", List.of(deptIds));
        updateWrapper.set("status", UserConstants.DEPT_NORMAL);
        SysDept sysDept = new SysDept();
        sysDept.setStatus(UserConstants.DEPT_NORMAL);
        deptMapper.update(sysDept, updateWrapper);
    }

    /**
     * 修改子元素关系
     *
     * @param deptId       被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors) {
        List<SysDept> children = new LambdaQueryChainWrapper<>(deptMapper)
                .apply("find_in_set({0}, ancestors)", deptId)
                .list();
        if (children.isEmpty()) {
            return;
        }
        for (SysDept child : children) {
            child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
        }
        LambdaUpdateWrapper<SysDept> updateWrapper = new UpdateWrapper<SysDept>()
                .lambda();
        for (SysDept child : children) {
            updateWrapper.eq(SysDept::getDeptId, child.getDeptId())
                    .set(SysDept::getAncestors, child.getAncestors());
            deptMapper.update(child, updateWrapper);
        }

    }

    /**
     * 删除部门管理信息
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public int deleteDeptById(Long deptId) {
        return deptMapper.deleteById(deptId);
    }

    @Override
    public List<SysDept> selectDeptListByIds(List<Long> deptIds) {

        return deptMapper.selectByIds(deptIds);
    }

    /**
     * 递归列表
     */
    private void recursionFn(List<SysDept> list, SysDept t) {
        // 得到子节点列表
        List<SysDept> childList = getChildList(list, t);
        t.setChildren(childList);
        for (SysDept tChild : childList) {
            if (hasChild(list, tChild)) {
                recursionFn(list, tChild);
            }
        }
    }

    /**
     * 得到子节点列表
     */
    private List<SysDept> getChildList(List<SysDept> list, SysDept t) {
        List<SysDept> tlist = new ArrayList<>();
        Iterator<SysDept> it = list.iterator();
        while (it.hasNext()) {
            SysDept n = it.next();
            if (StringUtils.isNotNull(n.getParentId()) && n.getParentId().longValue() == t.getDeptId().longValue()) {
                tlist.add(n);
            }
        }
        return tlist;
    }

    /**
     * 判断是否有子节点
     */
    private boolean hasChild(List<SysDept> list, SysDept t) {
        return getChildList(list, t).size() > 0;
    }
}
